Many advised us that Athens was imminently skippable on our tour of the Greek Islands. I strongly disagree. While the city's old and new worlds seems to struggle to coexist, the artifacts in and around Athens are phenomenal and day trips from Athens were exceptional.
Kiki Zikou of Dolphin Hells Travel Agency ph. 9227772 made our trip!!! Booking our trip to Greece was a challenge until we found Kiki. She arranged EVERYTHING for us from hotels, to ferries, to tours, to cabs. And we were in touch with her the entire time we were in Greece for any advice or additional help we needed. Kiki was a GODSEND! It honestly was like having a local friend/relative who stewarded us through each step.
Even if you don't use Kiki I still HIGHLY recommend using a Greek travel agent, as opposed to an American one. I saw a lot of people get bumped off ferries, find "lost" hotel reservations and get shut out of tours. I really believe Kiki's interconnection with the local tourist industry is what made our trip so seamless.